Wrench



(No Model.)

A. B; OHADWICK. WRENCH.

No. 451,024. Patented Apr. '28, 1891.

I Jnve'nfor:

leaf/g6.

STATES ATENT Prion.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 451,024, dated April28, 1891.

Application filed December 24,1890. Serial No. 375,675. (No model.)

T a/ZZ whom, it may concern.-

Be it known that I, AMBROSE B. OHADWICK, a citizen of the United States,residing at Pullman, in the county of Cook and State of lllinois, haveinvented certain new and useful Improvements in XVrenches, of which I dodeclare the following to be a full, clear, and exact description,reference being had to the accompanying drawings, forming part of thisspecification.

My invention has for its object to provide an improved wrench that shallbe simple, cheap, and durable in construction, and that can be readilyadapted for various purposes, andthe adjustment of which to permit thegripping of various objects can. be rapidly efiected. This object ofinvention I have accomplished by providing the various novel features ofconstruction hereinafterdescribed,'illustrated in the accompanyingdrawings, and particularly pointed out in the claims at the end of thisspecification.

Figure 1 is a view in side elevation of a wrench embodying myimprovements. Fig. 2 is a view in vertical longitudinal section, partsbeing shown in elevation. Fig. 3 is a view in transverse section on line3 3 of Fig. 1. Fig. 4 is a view in transverse section on line 4 4: ofFig. 1.

A designates the body of the wrench, that will be provided with a handlea, conveniently attached thereto or formed in piece therewith.

The body A is preferably flattened on its opposite edges or providedwith the screwthreads at, whereon is carried the threaded adjusting-nutB, that is held within the cutaway space 0 of the sliding block 0,thissliding block being held upon the body of the wrench in a mannerpermitting it to move thereon without turning.

To the end of the body A are conveniently attached the pivoted jawsDandD. By preference the jaw D is furnished with the plates or extensionsd, and the jaw D is furnished in like manner with the overlapping platescl, being of proper size to set over the plates (1 of the jaw D, andthrough the plates at and d of the jaws D and D passes the pivot-bolt E,that extends through a perforation in the end of the body A of thewrench and serves to securely hold the jaws in place, the ends of thebolt E being upset or headed ping-face of the jaw D is serrated ortoothed,

as at (Z and bypreference the corresponding face of the jaw D is milledor roughened, so as to better enable the jaws to grip the object uponwhich the wrench is to be used.

My purpose in milling the face of the jaw D in the manner shown is toprevent the locking of the jaws upon the article held therein, whichwould be the case if each of the jaws were provided with serrations orteeth like the jaw D.

Each of the jaws D and D isfurnished with an extended rear portion (land d, against the inner inclined face of which will'bear the beveledportion of the sliding block 0.

From the foregoing description it will be seen that when it is desiredto adjust the pivot-jaws D and D of the wrench itis only necessary toturn the adjusting screw 13, thereby causing the block 0 to be shiftedin either direction, and as the block 0 is thus shifted it will bearagainst theinclined faces of the rear portions of the jaws D and D,thereby causing these jaws to close to the desired extent. hen thesliding blockOis retracted by the turning of the thumb-screw B, thecoiled spring F will open the jaws as the sliding block recedes frombetween the rear portions of the jaws. As the slide-block 0 serves tosimultaneously operate both of the jaws D and D, it is obvious that avery quick adjustment of the jaws can be effected.

A very important feature of my invention is the employment of thesliding block 0, held upon the body A and operated by a screw-nut B,since by the use of a sliding block controlled by separate screw-nut noturning of the block is required, but a simple straight movement thereofagainst the face of the jaw is had. This feature of my invention, whileespecially adapted for a wrench having two pivoted jaws, as aboveindicated, could also be employed with advantage in connection with awrench having a single pivot-j aw, since it is obvious that if one ofthe jawsfor example, the jaw Dwere formed in piece with the body of thewrench A, the rear end of such jaw D being omitted, the shifting of thepivoted jaw D could still be effected by the movement of the blocks 0and screw-nut B. In other words, while I regard the employment of thetwo jaws as a very material advance, still I wish my invention, so faras the use of the sliding block and screw-nut are concerned, to beunderstood as applying also to wrenches in which a single pivoted jawoperated by such block and nut is employed.

In practice my invention has proved highly efficient, being adapted to agreat variety of Work, and by its simplicity and durability and the easewith which it can be adjusted commending itself to those familiar withthis class of devices.

Having thus described my invention, what I claim as new, and desire tosecure by Let ters Patent, is-

1. A wrench comprising a threaded body, two jaws at the end of saidbody, one at least of said jaws being pivoted to the body and providedwith an extended rear portion, a slide-block mounted upon said body, anda screw-nut upon said body for shifting the slide-block to operate thejaw, substantially as described.

2. A wrench comprising a threaded body, two jaws at the end of saidbody, one at least of said jaws being pivoted to the body and providedwith an extended rear portion, a slide block mounted upon said body andformed with a space to receive a screw-nut, and a screw-nut upon thebody and within the space of the slide-block for shifting theslideblock: to operate the jaw, substantially as described.

A wrench comprising a threaded body having pivoted jaws at its end, aslide-block for forcing said jaws together, and a screwnut for shiftingsaid slide-block, substantially as described.

4:. A wrench comprising a threaded body having pivoted jaws at its end,a slide-block for forcing said jaws together, a screw-nut for shiftingsaid slide-block, and a spring for forcingsaid jaws apart, substantiallyas described.

5. A wrenclrcomprising a body A, having flattened sides and threadedportions and having pivoted jaws at its end, said jaws being formed withextended rear portions, a sliding block (3, mounted upon said body A andprovided with a space a, and a screw-nut B, held within said slidingblock C, substantially as described.

AMBROSE B. CIIADIVICK.

Witnesses:

GEO. P. FIsHER, J12, "lnouns D. OnADwioK.

